US3778770A - Switching system having coded push-buttons - Google Patents
Switching system having coded push-buttons Download PDFInfo
- Publication number
- US3778770A US3778770A US00193945A US3778770DA US3778770A US 3778770 A US3778770 A US 3778770A US 00193945 A US00193945 A US 00193945A US 3778770D A US3778770D A US 3778770DA US 3778770 A US3778770 A US 3778770A
- Authority
- US
- United States
- Prior art keywords
- switch
- switching
- manual operation
- associated device
- switching system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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Classifications
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07C—TIME OR ATTENDANCE REGISTERS; REGISTERING OR INDICATING THE WORKING OF MACHINES; GENERATING RANDOM NUMBERS; VOTING OR LOTTERY APPARATUS; ARRANGEMENTS, SYSTEMS OR APPARATUS FOR CHECKING NOT PROVIDED FOR ELSEWHERE
- G07C9/00—Individual registration on entry or exit
- G07C9/00174—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys
- G07C9/00658—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys
- G07C9/00674—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with switch-buttons
- G07C9/0069—Electronically operated locks; Circuits therefor; Nonmechanical keys therefor, e.g. passive or active electrical keys or other data carriers without mechanical keys operated by passive electrical keys with switch-buttons actuated in a predetermined sequence
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Push-Button Switches (AREA)
- Burglar Alarm Systems (AREA)
- Input From Keyboards Or The Like (AREA)
- Lock And Its Accessories (AREA)
Abstract
An elective lock in the form of a set of pushbuttons which each have an alternately closing and opening contact. The contacts are connected in parallel with one another, so that switching off the lock is possible only by pushing solely the same buttons as are pushed in locking the device.
Description
United States Patent Hagendoorn et al.
[451 Dec. 11, 1973 i SWITCHING SYSTEM HAVING CODED PUSH-BUTTONS Inventors: Johan Gerard Hagendoorn; Dick Schieving, both of Emmasingel, Eindhoven, Netherlands U.S. Philips Corporation, New York, NY.
Filed: Oct. 29, '1971 Appl. N0.: 193,945
Assignee:
Foreign Application Priority Data Nov. 17, 1970 Netherlands 7016330 U.S. C1....... 340/149 R, 340/149 A, 340/164 B Int. Cl. H04q 5/00 Field of Search 340/149 R, 149 A,
[56] References Cited UNITED STATES PATENTS 2,197,802 4/1940 James 340/149 R UX 2,225,715 12/1940 Schneider 340/149 R UX 3,353,383 11/1967 Fish 340/149 R UX Primary Examiner-Harold 1. Pitts AttorneyFrank R. Trifari [57] ABSTRACT An elective lock in the form of'a set of pushbuttons which each have an alternately closing and opening contact. The contacts are connected in parallel with one another, so that switching off the lock is possible only by pushing solely the same buttons as are pushed in locking the device.
3 Claims, 2 Drawing Figures BURIGLAR ALARM OPERIIBTING L- SL E SWITCHING SYSTEM HAVING CODED PUSH-BUTTONS The invention relates to a switching system for rendering an apparatus operative or inoperative. The system comprises a plurality of operating members which return to their rest positions. Several of the members are to be operated according to a predetermined code to enable the apparatus to be switched off. Such switching systems may be used, for example, for switching off an alarm apparatus, for opening a door, and so on. It is an object of the invention to provide a simple and cheap arrangement in which the code may readily be changed.
According to the invention the same operating members may be used for setting the code thereby rendering the locking on other apparatus operative and on the other hand for rendering the locking on other apparatus inoperative. A very simple embodiment of this principle is characterized in that the operating members each operate a switching member having a bistable alternately closing and opening contact, the contacts of all the members being connected in parallel in the switch-on and switch-off circuit of the apparatus.
An embodiment of the invention will now be described, by way of example, with reference to the accompanying diagrammatic drawings, in which:
' FIG. 1 is a block schematic diagram of a system according to the invention, and
FIG. 2 shows schematically a part of this system.
The arrangement shown in FIG. 1 comprises a number of pushbuttons 1 which serve as operating members and are always returned to their illustrated rest positions by a spring (not shown). When a pushbutton 1 is depressed (in the direction indicated by the arrow) an associated switching member 3 is operated, for example by means of an operating slide 5 with which it is provided thereby closing a contact 7. The switching member 3 is such that after each operation the contact 7 alternately opens and closes (push-push switch) and may, for example, be of the type having two automatically alternating positions, as frequently used for switching table lamps, floor lamps and the like on and off. However, the pushbutton 1 may also be directly used for operating an auxiliary contact to control a flipflop circuit which may alternately render a transistor conductive and non-conductive. In this case the transistor serves as an electronic switch playing the part of the contact 7.
As FIG. 1 shows, the contacts 7 are connected in parallel in the switch-on and switch-off circuit, i.e. in the circuit for rendering operative and inoperative an apparatus 9, in particular a burglar alarm apparatus. For rendering such an apparatus operative an arbitrary number of pushbuttons are depressed in an arbitrary combination, for examples the first, third and fifth buttons. To render the apparatus inoperative the same buttons must again be pushed, because otherwise the said circuit remains closed. If an attempt should be made to render the alarm apparatus inoperative by depressing all the buttons, the three previously closed contacts 7 would, it is true, be opened, but the remaining contacts would be closed. Thus, the code which must be known in order to enable the apparatus to be switched off may readily be changed, since the same operating members are used for setting the code and at the same time switching the apparatus on and for switching it off, that is, the same members are used for encoding and for decoding.
An inexpensive embodiment of the switching system described having simple mechanically operated switches which each have two automatically alternating positions is also highly suited for use with burglar alarm apparatus, for example alarm apparatus of the type which is provided with an ultrasonic transmitter and receiver. This type of alarm apparatus responds after a short delay time to frequency variations of the ultrasonic signal received after reflection by sounding an alarm. These frequency variations are due to the Doppler effect. The delay time is necessary to enable the user to switch off the apparatus before the alarm is sounded. The housing 11 of the burglar alarm apparatus preferably also accommodates the pushbuttons 1. If suitable switching members are used, this time is too short to permit an intruder to find the code in time by a trial-and-error method.
FIG. 2 shows schematically a switching member which may be used in the switching system described. To a pushbutton 1 capable of being depressed against the action of a spring 13 there is secured a resilient tongue 15 which plays the part of the operating slide 5 of FIG. 1 and stepwise drives a ratchet wheel 17 made of an insulating material. The ratchet wheel carries a plurality of strip-shaped contacts 19 which in the manner shown so cooperate with two fixed contact springs 21 that the electric contact between these springs corresponding to the spring 7 is alternately closed and opened at each step.
What is claimed is:
l. A switching apparatus for selectively forming a conductive path and a non-conductive whereby an associated device may be selectively energized and disabled, comprising a plurality of bistable switching members; each member comprising a manually operated button biased to return to a single mutual position after release of manual pressure, and a bistable switch having at least two contacts alternately forming a conductive and a non-conducting path in response to manual operation of the button; and means for connecting all of the bistable switch contacts in parallel with the associated device, whereby a first manual operation of selected switching members to a stable conducting state forms a conducting path across the associated device, the conducting patli being removable only by manual operation of solely those members selected during the first manual operation.
2. Switching system as claimed in claim 1, characterized in that the manually operated buttons are pushbuttons which each operate a switch having two automatically alternating positions.
3. Switching system as claimed in claim 1, characterized in that the associated device it serves to switch on and switch off is a burglar alarm apparatus with a given time delay.
$g;;g; UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent 3,778,770 Dated December ll, 1973 I t JOHAN GERARD HAGENDOORN and DICK SCHIEVING It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:
' ON THE TITLE PAGE [301 Foreign Application Priority Data Nov. 17, 1970 Netherlands .7016330" should read -[30] Foreigh Application Priority Data Nov. 7, 1970 Netherlands .7016330 Signed and sealed this 16th day of April 1.97M.
(SEAL) Attest:
EDWARD M.FIETCHER,JR. c. MARSHALL DANN Attesting Officer Commissioner of Patents
Claims (3)
1. A switching apparatus for selectively forming a conductive path and a non-conductive whereby an associated device may be selectively energized and disabled, comprising a plurality of bistable switching members; each member comprising a manually operated button biased to return to a single mutual position after release of manual pressure, and a bistable switch having at least two contacts alternately forming a conductive and a nonconducting path in response to manual operation of the button; and means for connecting all of the bistable switch contacts in parallel with the associated device, whereby a first manual operation of selected switching members to a stable conducting state forms a conducting path across the associated device, the conducting path being removable only by manual operation of solely those members selected during the first manual operation.
2. Switching system as claimed in claim 1, characterized in that the manually operated buttons are pushbuttons which each operate a switch having two automatically alternating positions.
3. Switching system as claimed in claim 1, characterized in that the associated device it serves to switch on and switch off is a burglar alarm apparatus with a given time delay.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL7016330.A NL156845B (en) | 1970-11-07 | 1970-11-07 | SWITCHING SYSTEM FOR PUTTING AN APPLIANCE ON OR SHUTDOWN. |
Publications (1)
Publication Number | Publication Date |
---|---|
US3778770A true US3778770A (en) | 1973-12-11 |
Family
ID=19811487
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00193945A Expired - Lifetime US3778770A (en) | 1970-11-07 | 1971-10-29 | Switching system having coded push-buttons |
Country Status (9)
Country | Link |
---|---|
US (1) | US3778770A (en) |
JP (1) | JPS5372495U (en) |
CA (1) | CA969646A (en) |
CH (1) | CH539308A (en) |
FR (1) | FR2113632A5 (en) |
GB (1) | GB1323260A (en) |
IT (1) | IT942272B (en) |
NL (1) | NL156845B (en) |
SE (1) | SE370138B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4021796A (en) * | 1975-10-15 | 1977-05-03 | Detect-All Security Systems, Inc. | Pushbutton purmutation code control means for a security alarm system |
US4189719A (en) * | 1977-09-19 | 1980-02-19 | The Stoneleigh Trust | Intrusion alarm systems |
DE3241071A1 (en) * | 1982-11-06 | 1984-02-09 | Georg 8201 Eggstätt Hilger | Combination ignition lock, also for use in motorbike engines |
US4673914A (en) * | 1984-03-20 | 1987-06-16 | Lee Ki Chang | Keyless automobile door lock/unlock, ignition switching and burglar alarm system |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2197802A (en) * | 1937-09-13 | 1940-04-23 | James Jack Paterson | Electromagnetic lock |
US2225715A (en) * | 1937-03-05 | 1940-12-24 | Schneider Johann | Electric locking device |
US3353383A (en) * | 1964-12-18 | 1967-11-21 | A M Fish Holdings Ltd | Door locking means |
-
1970
- 1970-11-07 NL NL7016330.A patent/NL156845B/en unknown
-
1971
- 1971-10-29 US US00193945A patent/US3778770A/en not_active Expired - Lifetime
- 1971-11-02 CA CA126,649A patent/CA969646A/en not_active Expired
- 1971-11-03 IT IT53868/71A patent/IT942272B/en active
- 1971-11-04 GB GB5135671A patent/GB1323260A/en not_active Expired
- 1971-11-04 SE SE14080/71A patent/SE370138B/xx unknown
- 1971-11-04 CH CH1605471A patent/CH539308A/en not_active IP Right Cessation
- 1971-11-05 FR FR7139793A patent/FR2113632A5/fr not_active Expired
-
1977
- 1977-11-01 JP JP1977145913U patent/JPS5372495U/ja active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2225715A (en) * | 1937-03-05 | 1940-12-24 | Schneider Johann | Electric locking device |
US2197802A (en) * | 1937-09-13 | 1940-04-23 | James Jack Paterson | Electromagnetic lock |
US3353383A (en) * | 1964-12-18 | 1967-11-21 | A M Fish Holdings Ltd | Door locking means |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4021796A (en) * | 1975-10-15 | 1977-05-03 | Detect-All Security Systems, Inc. | Pushbutton purmutation code control means for a security alarm system |
US4189719A (en) * | 1977-09-19 | 1980-02-19 | The Stoneleigh Trust | Intrusion alarm systems |
DE3241071A1 (en) * | 1982-11-06 | 1984-02-09 | Georg 8201 Eggstätt Hilger | Combination ignition lock, also for use in motorbike engines |
US4673914A (en) * | 1984-03-20 | 1987-06-16 | Lee Ki Chang | Keyless automobile door lock/unlock, ignition switching and burglar alarm system |
Also Published As
Publication number | Publication date |
---|---|
NL156845B (en) | 1978-05-16 |
JPS5372495U (en) | 1978-06-17 |
SE370138B (en) | 1974-09-30 |
DE2151930B2 (en) | 1977-03-10 |
GB1323260A (en) | 1973-07-11 |
FR2113632A5 (en) | 1972-06-23 |
CH539308A (en) | 1973-07-15 |
DE2151930A1 (en) | 1972-05-18 |
NL7016330A (en) | 1972-05-09 |
IT942272B (en) | 1973-03-20 |
CA969646A (en) | 1975-06-17 |
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